243290688 has 112 divisors (see below), whose sum is σ = 690311040. Its totient is φ = 75423744.

The previous prime is 243290683. The next prime is 243290693. The reversal of 243290688 is 886092342.

243290688 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (243290683) and next prime (243290693).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (243290683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162648 + ... + 164136.

Almost surely, 2^243290688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243290688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (345155520).

243290688 is an abundant number, since it is smaller than the sum of its proper divisors (447020352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243290688 is a wasteful number, since it uses less digits than its factorization.

243290688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1564 (or 1554 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 243290688 is about 15597.7783033354. The cubic root of 243290688 is about 624.2738771463.

The spelling of 243290688 in words is "two hundred forty-three million, two hundred ninety thousand, six hundred eighty-eight".